diff --git a/badges/test_coverage.svg b/badges/test_coverage.svg
index 636889bb0dd44e670b01f12609116f86ab4a8362..0cbe944de00ae5093ce749ace546d3a8ece7b0a4 100644
--- a/badges/test_coverage.svg
+++ b/badges/test_coverage.svg
@@ -15,7 +15,7 @@
     <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
         <text x="31.5" y="15" fill="#010101" fill-opacity=".3">coverage</text>
         <text x="31.5" y="14">coverage</text>
-        <text x="80" y="15" fill="#010101" fill-opacity=".3">44%</text>
-        <text x="80" y="14">44%</text>
+        <text x="80" y="15" fill="#010101" fill-opacity=".3">45%</text>
+        <text x="80" y="14">45%</text>
     </g>
 </svg>
diff --git a/binarycpython/tests/test_grid.py b/binarycpython/tests/test_grid.py
index 6d2469bbca2d31e816230f4f9bd2fdfd884284be..a3bee3a6b4e32b95c966ebe66c91e067615edcb4 100644
--- a/binarycpython/tests/test_grid.py
+++ b/binarycpython/tests/test_grid.py
@@ -26,6 +26,7 @@ TODO: Before running the non-unit tests to cover functions like evolve, we need
 
 import os
 import sys
+import json
 import unittest
 
 from binarycpython.utils.functions import (
diff --git a/binarycpython/utils/population_extensions/_dataIO.py b/binarycpython/utils/population_extensions/_dataIO.py
index ff19dbba53c3df8616fbf69461885bfdc486cac8..9e28d1ff7df4d445f07366696156ec7de23f7182 100644
--- a/binarycpython/utils/population_extensions/_dataIO.py
+++ b/binarycpython/utils/population_extensions/_dataIO.py
@@ -666,7 +666,9 @@ class dataIO:
     def NFS_flush_hack(self, filename):
         """
         Use opendir()/closedir() to flush NFS access to a file.
-        Note: this may or may not work!
+        NOTE: this may or may not work!
+
+        TODO: This function leads to a complaint about unclosed scandir operators. Check if that can be resolved.
         """
         os.sync()
         dirname = os.path.dirname(filename)
diff --git a/development_requirements.txt b/development_requirements.txt
index 4f93d477aed1b6d0d997d745f0c2334e77ea70bf..a751ebdbae6631470fa7f5d0918cf675aa5d00c5 100644
--- a/development_requirements.txt
+++ b/development_requirements.txt
@@ -4,3 +4,6 @@ sphinx
 sphinx_autodoc_typehints
 nbsphinx
 twine
+docstr-coverage
+coverage
+coverage-badge